Lac Megantic (Canada): At least 80 people are missing after a driverless oil tanker train derailed and exploded in the small Canadian town of Lac-Megantic, destroying dozens of buildings, a firefighter back from the scene has said.

The accident in the small Quebec town, located around 250 kilometers east of Montreal on Saturday, created a spectacular fireball and forced 2,000 people from their homes.

Officials earlier only confirmed one fatality, but had warned the toll could rise. A search for bodies was to begin on Sunday morning. The firefighter said on condition of anonymity that there had been at least 50 people in one bar that was consumed by the flames. "There is nothing left," he said.

Witnesses reported as many as six explosions after the train derailed at about 0520 GMT in Lac-Megantic, a picturesque resort town of 6,000 residents near the border with the US state of Maine.

An initial evacuation zone of a kilometer around the crash site was widened on Saturday as a precaution against harmful particles in the air, bringing the total to 2,000 people forced to leave their homes.

Around 150 firefighters were battling the blaze, including some who came across the border from Maine, just 25 kilometers south of the town. The cause of the crash was still unknown, but a spokesman for the Montreal Maine & Atlantic company, Christophe Journet, said the train had been stopped in the neighbouring town of Nantes, around 13 kilometers west of Lac-Megantic, for a crew changeover.